Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE may be purchased for30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Oflice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED MAY 12, 1970 874 O.G. 369

' ADDITIVE COMPOSITION Clarence E. Tholstrup and AlanBell, both of Box511,

Kingsport, Tenn. 37662 Continuation of application Ser. No. 664,965,Sept. 1, 1967. This application Nov. 20, 1969, Ser. No. 872,443

Int. Cl. C08g 51/02 US. Cl. 260-40 No Drawing. 15 Pages SpecificationAdditives (such as stabilizers, pigments, slip agents, and dyes) may beuniformly incorporated in moldable, fiber-, and film-forming polyestersvby mixing the additive with a copolyester having a melting point of fromabout 150 to 240 C. and an inherent viscosity of at least 0.5 and beinga copolyester of (1) from about 75 to about 95 mole percent of ethyleneglycol, (2) from about 5 to about 25 mole percent of a diol selectedfrom the group consisting of aliphatic diols having 4 to 10 carbon atomsand cycloaliphatic diols having 4 to 10 carbon atoms, and (3) at leastone difunctional dicarboxylic acid, and then blending the resultantadditive composition with said polyester.

